Fabrication of HKUST-1 Based Ink for Direct Writing of Precursors of Primary Explosives

As a direct-write molding technology based on the principle of layer-by-layer accumulation, inkjet printing has shown application prospects in the field of micro-sized energetic materials. Based on HKUST-1, the influence of three binders of polyvinyl alcohol, ethylcellulose, and polyvinylidene fluoride on the printing characteristics of precursor inks was explored. The binder system suitable for ink preparation was screened out, and the best printing parameters were determined. The matching rule between the printing line width and the needle aperture was studied. Moreover, the best ink formula and needle size which can achieve the target line width were selected. The optimized ink was pyrolyzed at a high temperature under an inert atmosphere to prepare a composite of nano-copper coated by porous carbon and copper azide-porous carbon composite energetic materials was in-situ prepared through a gas–solid azidation reaction. This work laid the foundation for the subsequent realization of micro-scale precision charges based on carbon-based copper azide energetic materials.